Found in the December 1974 issue of Radio Electronics, this circuit is similar to the previous one, only using another TTL counter. The circuit must be powered by 5 V.
This circuit converts signals from the 350 kHz to 500 kHz longwave (VLF) band to the 4.35 to 4.6...
This circuit was found in old documentation from Analog Devices. The integrated circuit is from...
We found this circuit on the internet, but it has some problems. It will be convenient to limit the...